We have changed how we collect and accept calendar information. Readers must now submit all items through our website. Go to events.contracostatimes.com, click on "submit your event," register at this point, then enter your event. You do not have to pay, and submitting your event in this way will ensure it is part of our easily searchable online database, as well as a candidate for space in our publications.

Oakland Earth Day Celebration. Do your part to make Oakland cleaner and greener by volunteering at one of over 80 locations throughout the city. 9 a.m. to noon April 26. Morcom Rose Garden, 700 Jean St., Oakland. Check website for other locations Free. 510-238-7611, www.oaklandearthday.org.

Zoovie Night. Jump in your jammies, bring your blankets and chairs, meet some nocturnal education animals, drink hot cocoa, eat popcorn and watch the family friendly movie, "Fern Gully." 6:30 to 9:30 p.m. April 26. Oakland Zoo, 9777 Golf Links Road, Oakland. Registration required. $7. 510-632-9525, ext. 220, www.oaklandzoo.org.

Saving the California Condor. The Oakland Zoo's Conservation Speaker Series continues with biologist Joe Burnett and Andrea Goodnight discussing the joint efforts of environmental organizations to save the 218 California condors in the wild. 6:30 to 9 p.m. April 30. Oakland Zoo, 9777 Golf Links Road, Oakland. $12-$20. 510-632-9525, ext. 122, www.oaklandzoo.org.

Montclair Elementary School Founders Day. The 88th annual Founder's Day luncheon celebration honors volunteers with food, a music program and a service awards ceremony. 11:30 a.m. to 1 p.m. May 14. Montclair Elementary School, 1757 Mountain Blvd., Oakland. RSVP by May 1. 510-339-6100, wonny.mullen@yahoo.com

Lego Mania at the Library. Kids can design, build and explore with hundreds of Legos available from the Lego Club. 3 to 5 p.m. May 2. Piedmont Avenue Branch Library, 80 Echo Ave., Oakland. Free. 510-597-5011, oaklandlibrary.org.

OYO Benefit Gala. The 50-year-old Oakland Youth Orchestra celebrates its golden anniversary with a benefit gala concert, dinner and auction to raise money for its award-winning and far-reaching education and outreach programs. 5 p.m. May 4. Greek Orthodox Cathedral of the Ascension, 4700 Lincoln Ave., Oakland. $125. 510-444-0801, www.oyo.org

67th Annual Spring Rose Show. The East Bay Rose Society will hold its 67th Annual Spring Rose Show from 1 to 5 p.m. May 4 at the Lakeside Park Garden Center, 666 Bellevue Avenue in Oakland. Backyard gardeners who love to grow and show roses will tell you how they grow their roses and answer your questions. Admission is free. For more information, go to www.eastbayroses.org.

Uptown Farmers Market. The Uptown Oakland Farmers' Market returns for the season with fresh local produce, music, kids' activities and more. 10 a.m. to 2 p.m. Wednesdays. Ordway Plaza, Kaiser Building, 2150 Valdez St., Oakland. 800-949-FARM, www.pcfma.com.

Free Computer Tutoring. Brush up on your computer basics at free computer tutoring. 1 to 3 p.m. Saturdays. 4 to 6 p.m. Tuesdays. Rockridge Branch Library. 5366 College Ave., Oakland. 510-597-5017, www.oaklandlibrary.org.

Peralta Hacienda Kids Club. Kids from 5 to 15 can play and experience Oakland's original rancho through traditional arts and hands-on activities: Make adobe bricks and corn husk dolls, learn about native plants and make seed balls, traipse through the creek area and participate in other nature-based tours. 2:30 to 5 p.m. Saturdays. Peralta Hacienda Historical Park, 2465 34th Ave., Oakland. Free. 510-532-9142, www.peraltahacienda.org.

PHS 30th Reunion. Advance ticket purchase is a must for Piedmont High School's class of 1984 30th reunion celebration. 6 to 11 p.m. June 21. Piedmont Commumnity Hall, 711 Highland Ave., Piedmont. $100. lpwillerup@ft.newyorklife.com or keithbarlow@sbcglobal.net.